I feel bad for your friend. What was the outcome? My board asked a lot of situational question as well. Mainly just the basic "what would you do if you're the DIVO" type questions. Also what if you don't get selected, what next? I replied that persistence is the key and nothing worth accomplishing comes easy, so I'll be strengthening my package and applying again next year.
Also I was asked, pilot or officer, which comes first? Remember first your are a military officer, then a pilot.
The board said they really appreciated my sincerity. I told them what I liked about the navy, and then what I would like to see change. Honesty is important. The purpose of the interview is to reveal the candidates true personality and integrity. The board doesn't want to hear the BS party lines like "Honor, Courage, and Commitment". They already know the core values; they want to get to know the candidate on a personal level. This was just my personal experience from my board. Every interviewer may be different. Just be yourself and speak your mind, but be respectful. Don't just give them the answers you think they want to hear. There are no right or wrong answers. Just be straightforward and confident. Confidence is the key.